import BpmnRenderer from 'bpmn-js/lib/draw/BpmnRenderer';

export default function CustomRenderer(
  config,
  eventBus,
  styles,
  pathMap,
  canvas,
  textRenderer,
) {
  BpmnRenderer.call(
    this,
    config,
    eventBus,
    styles,
    pathMap,
    canvas,
    textRenderer,
    2000,
  );

  this.handlers.label = function () {
    return null;
  };
}

const F = function () {}; // 核心，利用空对象作为中介；
F.prototype = BpmnRenderer.prototype; // 核心，将父类的原型赋值给空对象F；
CustomRenderer.prototype = new F(); // 核心，将 F的实例赋值给子类；
CustomRenderer.prototype.constructor = CustomRenderer; // 修复子类CustomRenderer的构造器指向，防止原型链的混乱；
